Fusible link.



' temperatures.

UNITED snares r a rnnr orricn.

now'nnn w. common; or NEW-YORK, n.

Y., nsslsnon or ONE-HALF T sxnas H.

POMEROY, 0F YORK, N. Y.; AND ONE-HALF TQPETER C. LENZ, 0F BROOKLYN,

NEW YonK.

FUSIBLE LINK.

I Be it known that I, HOWARD W. Co'rToN, a citizen of the United States, residing in the borough of Brooklyn, city and State of New York, have" invented certain new and useful Improvements in Fusible Links, of which the follf'owing is a full and clear specification.

' My invention relates in general to fusible links and particularly-to the kind employed in holding fire doors, windows and other closures 1n esired posit-ions and automatically releasing the same in the The object of this invention is to construct a fusible link in such manner that the membars com risin -the same will under norma-l conditions, safely carry the load placed upon them and automatically" and positively separate when subjected to high temperatures. This is accomplished by providing .each link member with a suitable opening disposedin such manner that said openings will register, when the members are placed upon each other. Within'these openings is placed a holding member around which is i placed the fusible element binding the link members and holding member together to form a common link.

.,.. The fusible links now used for the purposes above described are not satisfactory owing to{ their. uncertainty in properly carrying the load placed upon them. Openings l'have heretofore been made in the link .menr bers to permit the fusible element to .;,more securely bind said link members together, but even'this does not'remove the danger of separation caused on said link.

To accomplish the object above set forth and obtain a device that will meet the requirement demanded, I have devised and constructed a fusible link hereinafter fully j described in detail and the features of merit and novelty pointed out in the claims. 7

In the accompanying drawings Figure '1 is a face view of the two link members and the holding member bound together the fusible element. Fig. 2 is an edgeview of the same. Fig. 3' is a centralsection on the line 3-3 shown in Fig. 1. Fig. 4 is a. view of one of the link members.

embodiment of my invention is disclosed and consists essentially of two round end 1 Specification of Letters Patent.

presence of h1gh by the strain of the load Patented Apr. 7, 1914s.

Application filed November 21, 1912. Serial No. 732,790.

are fastened chains 9, wires or other suitable .means for holding the windows, doors or "closures in desired positions. Piercing the body of the links are openings 7 and 8, which, when the links are placed flatwise on each other will register in the manner shown in Fig. 3. The. metal surrounding these holes'is turned down at right angles to the body portion as shown at 7 and 8. Placed within these openings 7 and 8 is a holdin member-1O maggot any suitable non-fusible material. It-uiill be noticed that the openings 7 and 8 are approximately of the same diameter sothat the holding member will engage the walls of said openings at a point where the two link members engage each other. The'fusible material 15 partially surrounds the holding member andlfirmly binds it in the position shown in Fig. 3 in order that'the strain produced by the weight of,

the closure will be taken by the holding member 10 instead of the fusible material.

The fusible material 15 is distributed be son of a high temperature, causes the link members to separate. I have found that the best result is obtained by making the holding member in the form of a ball. By having the entire surface of the holding memher free from flattened, broken, irregular or angular lines, itwill be'impossible for it to retard the separation of the link members after the fusible material yields to the hi h Referring to the drawings the preferred temperature. It will be noticed that t e edge of the opening on the face of the plate "1 is slightly rounded which permits the possipoint of temperature. Of course it is understood that the relability ofthehblding member being retarded when the fusible materiel yields at its lowest 'tive proportions of the links, openings and v non-fusible holding member free from angu; lar' surfaces contained within the openings of I Within the link members.

2. A. fusible link comprising a plurality said link members and a. fusible material 'capable of binding said holding member of link members provided with openings, a non-fusible holding member contained within said openings but not engaging the walls" thereof, and a fusible element capable of binding said holding. member within said- "openings. Y

,3. A fusible link comprising a plurality of link members provided with'oircular openings extending uniformly therethrough e 'capable'.v of binding sa through said link members HOWARDW eoarro-N ball-shaped non-fusible holding r'nemberof less diameter tlian said; @einp gena eontained within said openings and a fusible material eapable of binding; saidholding 30 member within said o ienings. f v

4." A fusible link omprising a plul' lity ofplink -members provided wlthf openings extending entirely through each jjof said link tained withinsaid openings; and capable said'link members: 5. A .fu'siblell ink fcompris in when fused-pfpassing between or through of link members-"provided: with ope ugs extendingentire'ly hrough eal oh of saidilm a;

members in uniform diameter, non-fusible holding member'flo itame in said openings, ami e,

(siding within said openings, betw '0 when fused adapted to fpass lWitnesses' 1 WM. A. COURTL;

-- M. G. CRAWFO me-a member.

melnbers in uniform diameter, "and a. ball- 35 shaped non-fusible; holding memb'erg con: 

